DTPA-BpABA与锰配合物的结构表征和弛豫研究

X-ray single crystal analysis of a new paramagnetic manganese（Ⅱ） complex with DTPA-BpABA （a DTPAbisamide derivative）, Mn（DTPA-BpABA）·4H2O, shows that four oxygen atoms and three nitrogen atoms from the ligand coordinate to Mn（Ⅱ） cation, forming a seven-coordinate distorted pentagonal bipyramid polyhedron. In the crystal, the carboxyl groups and the nitrogen atoms extensively form hydrogen bonds with the lattice water molecules, building a 3D-network. The relaxometric study indicates that the R1 value of the paramagnetic manganese（Ⅱ）complex is 5.12 mmol·L·s^-1. The higher R1 value means that this complex may find an application in magnetic resonance imaging （MRI） technique.

Structural Characterization and Relaxivity Study of a New Paramagnetic Mn(II) Complex of DTPA‐BpABA

X‐ray single crystal analysis of a new paramagnetic manganese(II) complex with DTPA‐BpABA (a DTPA‐ bisamide derivative), Mn(DTPA‐BpABA)·4H₂O, shows that four oxygen atoms and three nitrogen atoms from the ligand coordinate to Mn(II) cation, forming a seven‐coordinate distorted pentagonal bipyramid polyhedron. In the crystal, the carboxyl groups and the nitrogen atoms extensively form hydrogen bonds with the lattice water molecules, building a 3D‐network. The relaxometric study indicates that the R₁ value of the paramagnetic manganese(II) complex is 5.12 mmol·L·s^‐1. The higher R₁ value means that this complex may find an application in magnetic resonance imaging (MRI) technique.